Rollie Fingers' handlebar mustache might be the most recognizable facial hair of any athlete ever. What many don’t know is his original intention for growing it. Major League Baseball had an unofficial rule against facial hair. But A’s owner Charles O. Finley went the exact opposite direction and offered financial incentives to his players for growing their hair out. Many sported excessive facial hair but none put the effort into it as Fingers did. His waxed curly mustache is reminiscent of a cartoon villain than a star pitcher.